Home / 13,947.31-20,920.96-4,086.59

Finding the Fourth Proportional to 13,947.31, 20,920.96 and 4,086.59

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Solution

The fourth proportional to 13,947.31, 20,920.96 and 4,086.59 is: 6,129.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,947.31 : 20,920.96 = 4,086.59 : x
  2. Step 2: Convert to fraction form
    13,947.31/20,920.96 = 4,086.59/x
  3. Step 3: Cross multiply
    13,947.31x = 20,920.96 × 4,086.59
  4. Step 4: Simplify right side
    13,947.31x = 85,495,260.89
  5. Step 5: Solve for x
    x = 85,495,260.89/13,947.31
  6. Step 6: Final answer
    x = 6,129.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.